UL 103HT/MH7399

• Use in interior or exterior installations to support and to stabilize the chimney while assuring a 2 in clearance Wall straps are required every 4 ft on exterior of building Adjusts 2 to 6 in from wall

DuraPlus® is designed to stay cool on the outside, to provide a hot draft on the inside, to boost stove efficiency and to provide for a fire-safe design that protects both the chimney and the building. This triple-wall chimney features two insulating layers (ceramic blanket, plus air space). The ceramic blanket insulation is held securely in position, eliminating hot spots common with loose fill type insulations. In the event of a creosote fire, the compressible blanket insulation permits the chimney liner to expand outwardly in a radial direction. Designed for normal, continuous operation at 1000 deg F flue gas temperatures, DuraPlus® subjected to rigorous and stringent HT requirements of the UL standard, including 1 hr at 1400 deg F, plus three 10 min chimney fire tests at 2100 deg F.